In the given figure, equivalent resistance between A and B will be
|
(a) |
(b) |
(c) |
(d) |
In the given figure, equivalent resistance between A and B will be
|
(a) |
(b) |
(c) |
(d) |
(a)
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If an ammeter is to be used in place of a voltmeter then we must connect with the ammeter a
|
(a) Low resistance in parallel |
(b) High resistance in parallel |
|
(c) High resistance in series |
(d) Low resistance in series |
The following four wires are made of the same material and are at the same temperature. Which one of them has highest electrical resistance
|
(a) Length = 50 cm, diameter = 0.5 mm |
(b) Length = 100 cm, diameter = 1 mm |
|
(c) Length = 200 cm, diameter = 2 mm |
(d) Length = 300 cm, diameter = 3 mm |
In P-type semiconductor, there is
|
(a) An excess of one electron |
(b) Absence of one electron |
|
(c) A missing atom |
(d) A donar level |
The resistance of a wire is R. If the length of the wire is doubled by stretching, then the new resistance will be
|
(a) 2R |
(b) 4R |
(c) R |
(d) |
A voltmeter having a resistance of 998 ohms is connected to a cell of e.m.f. 2 volt and internal resistance 2 ohm. The error in the measurement of e.m.f. will be
|
(a) 4 |
(b) 2 |
(c) 4 |
(d) 2 |
The current flowing through a lamp marked as 50 W and 250 V is
|
(a) 5 amp |
(b) 2.5 amp |
(c) 2 amp |
(d) 0.2 amp |
The Avogadro's number is 6
per gm mole and electronic charge is 1.6
. The Faraday's number is
|
(a) |
(b) |
|
(c) |
(d) |