- AVolt
- BCoulamb
- CJoul
- DWatt
Explanation:
Unit of electric potential difference is volt(V).
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion : A transistor is a voltage-operating device.
Reason : Base current is greater than the collector current.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
Two thin lenses of focal lengths and
are in contact and coaxial. The combination is equivalent to a single lens of power
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(a) |
(b) |
(c) |
(d) |
A conducting wire is dropped along east-west direction, then
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(a) No emf is induced |
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(b) No induced current flows |
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(c) Induced current flows from west to east |
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(d) Induced current flows from east to west |
A light has amplitude A and angle between analyser and polariser is 60°. Light is reflected by analyser has amplitude
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(a) A |
(b) A/ |
(c) |
(d) A/2 |
If a radioactive substance reduces to
of its original mass in 40 days, what is its half-life
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(a) 10 days |
(b) 20 days |
(c) 40 days |
(d) None of these |
A copper ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet while it is passing through the ring is
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(a) Equal to that due to gravity |
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(b) Less than that due to gravity |
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(c) More than that due to gravity |
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(d) Depends on the diameter of the ring and the length of the magnet |
The dimension of (1/2) : permittivity of free space; E : electric field) is
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(a) |
(b) |
(c) |
(d) |
The ratio of charge to potential of a body is known as
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(a) Capacitance |
(b) Conductance |
(c) Inductance |
(d) Resistance |