Current Electricity - ICSE STD 10 Physics Questions

Q 1[1 Mark Question Answer]1 Mark

What is consumed while using different electrical appliances, for which electricity bills are paid?

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Q 2[1 Mark Question Answer]1 Mark

What is the voltage of the electricity that is generally supplied to a house?

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Q 3[1 Mark Question Answer]1 Mark

State the S.I. units of electrical power.

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Q 4[1 Mark Question Answer]1 Mark

Explain the meaning of the statement 'the power of an appliance is 100 W'.

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Q 5[1 Mark Question Answer]1 Mark

Write an expression for the electrical power spent in flow of current through a conductor in terms of current and resistance.

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Q 6[2 Mark Question Answer]2 Marks

An electric iron is rated 750 W, 230 V. Calculate the electrical energy consumed by the iron in 16 hours.

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Q 7[2 Mark Question Answer]2 Marks

A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.

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Q 8[2 Mark Question Answer]2 Marks

Define the term kilowatt - hour and state its value in $S.I.$ unit.

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Q 9[2 Mark Question Answer]2 Marks

Name the physical quantity which is measured in (i) kW, (ii) kWh.

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Q 10[2 Mark Question Answer]2 Marks

State and define the household unit of electricity.

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Q 11[3 Mark Question Answer]3 Marks

A bulb marked 12 V, 24 W operates on a 12 V battery for 20 minutes. Calculate:

(i) The current flowing through it, and

(ii) The energy consumed.

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Q 12[3 Mark Question Answer]3 Marks

An electrical appliance having a resistance of 200 Ω is operated at 220 V. calculate the energy consumed by the appliance in 5 minutes.
in joules.

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Q 13[3 Mark Question Answer]3 Marks

An electric bulb is rated at 220 V, 100 W.
(a) What is its resistance?
(b) What safe current can be passed through it?

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Q 14[3 Mark Question Answer]3 Marks

An electric bulb is rated '100 W, 250 V'. How much current will the bulb draw if connected to a 250 V supply ?

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Q 15[3 Mark Question Answer]3 Marks

Calculate the current through a 60 W lamp rated 250 V. If the line voltage falls to 200 V, how is power consumed by the bulb affected?

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Q 16[5 Mark Question Answer]5 Marks

An electrical appliance having a resistance of 200 Ω is operated at 220 V. calculate the energy consumed by the appliance in 5 minutes in kWh.

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Q 17[5 Mark Question Answer]5 Marks

A geyser is rated 1500 W, 250 V. This geyser is connected to 250 V mains. Calculate:

(i) The current drawn,

(ii) The energy consumed in 50 hours, and

(iii) The cost of energy consumed at Rs 4.20 per kWh.

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Q 18[5 Mark Question Answer]5 Marks

A battery of e.m.f. 15 V and internal resistance 2 Ω is connected to two resistors of resistances 4 ohm and 6 ohm joined (a) in series. Find in each case the electrical energy spent per minute in 6 Ω resistor.

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Q 19[5 Mark Question Answer]5 Marks

Two resistors A and B of 4 Ω and 6 Ω respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate :

the power dissipated in each resistor.

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Q 20[5 Mark Question Answer]5 Marks

Two resistors A and B of 4 Ω and 6 Ω respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate: the power supplied by the battery .

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Q 21MCQ1 Mark

An electrical appliance has a rating 100 W, 120V. The resistance of element of appliance when in use:

A
1.2 Ω
✓
144 Ω
C
120 Ω
D
100 Ω

Answer: B.

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Q 22MCQ1 Mark

In series combination of resistances:

A
P.d. is same across each resistance
B
Total resistance is reduced
✓
Current is same in each resistance
D
All of the above are true

Answer: C.

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Q 23MCQ1 Mark

For which of the following substance, resistance decreases with increase in temperature?

A
Copper
B
Mercury
✓
Carbon
D
Platinum

Answer: C.

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Q 24MCQ1 Mark

Which of the following is an ohmic resistance?

A
LED
B
Junction diode
C
Filament of a bulb
✓
Nichrome wire

Answer: D.

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Q 25MCQ1 Mark

When a current I flows through a resistance R for time t, the electrical energy spent is given by :

A
$IRt$
✓
$1^2 Rt$
C
$I^2 t t$
D
$I^{\wedge} 2 R / t$

Answer: B.

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Q 26fill in the blanks.1 Mark

With increase in temperature, the resistivity of manganin __________ [decreases/ remains unchanged/increases].

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Q 27fill in the blanks.1 Mark

Current is the rate of flow of ________ [Charge/resistance/ potential difference] per unit time.

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Q 28fill in the blanks.1 Mark

Unit of electrical energy consumed if power is expressed in watt is ________ [watt hour/jule second/watt].

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Q 29fill in the blanks.1 Mark

The effective resistance in ________ [series/parallel/combination] is sum of individual resistances.

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Q 30fill in the blanks.1 Mark

Slope of graph for parallel combination for $V / s I$ is __________ [less/more/unpredict].

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Current Electricity question types

Current Electricity questions

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Current Electricity Physics - Current Electricity

Current Electricity question types

Current Electricity questions

Generate a Current Electricity paper free