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10 questions · timed · auto-graded

Question 11 Mark
Tungsten is used for filaments in incandescent lamps as they do not _______ at high temperatures.
Answer
Tungsten is used for filaments in incandescent lamps as they do not Oxidize at high temperatures.

Explanation:

Tungsten is used to make filaments of electric bulb as they have high.resistivity, high melting point and do not oxidise readily at high temperatures.

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Question 21 Mark
Slope of a V-I graph is a measure of _______
Answer
Slope of a V-I graph is a measure of Resistance.
Explanation:
Slope of V-I will give R.
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Question 31 Mark
Resistivity of ________ increases with drop in temperature.
Answer
Resistivity of Metal increases with drop in temperature.

Explanation:

The resistivity (and resistance) of a metal (conductor) increases as the temperature is increased. The resistance of a semiconductor decreases, and its conductivity increases, as the

temperature is increased.

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Question 41 Mark
Resistance is measured in _________ The resistance of a wire increases as the length _________ as the temperature _________ and as the cross-sectional area _________.
Answer
Resistance is measured in Ohms The resistance of a wire increases as the length increases as the temperature increases and as the cross-sectional area decreases.
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Question 51 Mark
Potential difference is measured in __________ by using a __________ placed in __________ across a component.
Answer
Potential difference is measured in volts by using a voltmeter placed in parallel across a component.
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Question 61 Mark
Ohm’s law states a relation between potential difference and ________.
Answer
Ohm’s law states a relation between potential difference and Current.
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Question 71 Mark
Fuse wires are not connected in _______
Answer
Fuse wires are not connected in Neutral.
Explanation:
Fuse is not connected with neutral why? In electrical circuits, fuses are used as a protective device to prevent the circuit from an excess current flow. An excess current flow can cause
due to many reasons such as short circuit, overload, etc.
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Question 81 Mark
Current is measured in __________ using an __________ placed in __________ in a circuit.
Answer
Current is measured in amperes using an ammeter placed in series in a circuit.
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Question 91 Mark
Copper is a good _______ Plastic is an _______.
Answer
Copper is a good Conductor Plastic is an insulator.
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Question 101 Mark
A current is a flow of _________ For this to happen there must be a _________.
Answer
A current is a flow of electrons For this to happen there must be a closed.
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Fill in the blank [Phy-1M] - Science STD 10 Questions - Vidyadip