Consider the following two statements A and B and identify the correct choice given in the answers
(A) Duddells thermo-galvanometer is suitable to measure direct current only
(B) Thermopile can measure temperature differences of the order of 
|
(a) Both A and B are true |
(b) Both A and B are false |
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(c) A is true but B is false |
(d) A is false but B is true |
(d) A is false but B is true
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In the circuit, the reading of the ammeter is (assume internal resistance of the battery be zero)
|
(a) |
(b) |
(c) |
(d) 2 A |
Which of the nine planets is nearest to sun
|
(a) Venus |
(b) Mercury |
(c) Mars |
(d) Jupiter |
Two capacitors C1 and C2 = 2C1 are connected in a circuit with a switch between them as shown in the figure. Initially the switch is open and C1 holds charge Q. The switch is closed. At steady state, the charge on each capacitor will be
|
(a) Q, 2Q |
(b) Q/3, 2Q/3 |
(c) 3Q/2, 3Q |
(d) 2Q/3, 4Q/3 |
In a primary coil 5A current is flowing on 220 volts. In the secondary coil 2200V voltage produces. Then ratio of number of turns in secondary coil and primary coil will be
|
(a) 1 : 10 |
(b) 10 : 1 |
(c) 1 : 1 |
(d) 11 : 1 |
Constantan wire is used in making standard resistances because its
|
(a) Specific resistance is low |
|
(b) Density is high |
|
(c) Temperature coefficient of resistance is negligible |
|
(d) Melting point is high |
In the following diagram if V2 > V1 then
|
(a) |
(b) |
(c) |
(d) |
An electron enters a region where electrostatic field is 20N/C and magnetic field is 5T. If electron passes undeflected through the region, then velocity of electron will be
|
(a) |
(b) |
(c) |
(d) |
