What physical quantities may X and Y represent ? (Y represents the first mentioned quantity)
|
(a) Pressure v/s temperature of a given gas (constant volume) |
|
(b) Kinetic energy v/s velocity of a particle |
|
(c) Capacitance v/s charge to give a constant potential |
|
(d) Potential v/s capacitance to give a constant charge |
(d) Potential v/s capacitance to give a constant charge
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Peltier co-efficient of a thermo couple is 2 nano volts. How much heat is developed at a junction if 2.5 amp current flows for 2 minute
|
(a) 6 ergs |
(b) 6 |
(c) 16 ergs |
(d) 6 |
The pressure exerted by an electromagnetic wave of intensity I (watts/m2) on a nonreflecting surface is [c is the velocity of light]
|
(a) Ic |
(b) |
(c) I/c |
(d) |
$0$
$\delta$
$2\delta$
$3\delta$
The capacitor of capacitance 4μF and 6 μF are connected in series. A potential difference of 500 volts applied to the outer plates of the two capacitor system. Then the charge on each capacitor is numerically
|
(a) 6000 C |
(b) 1200 C |
(c) 1200 μC |
(d) 6000 μC |
Particles having positive charges occasionally come with high velocity from the sky towards the earth. On account of the magnetic field of earth, they would be deflected towards the
|
(a) North |
(b) South |
(c) East |
(d) West |
If 
be the electric field strength of a short dipole at a point on its axial line and 
that on the equatorial line at the same distance, then
|
(a) |
(b) |
(c) |
(d) None of the above |
Two identical heaters rated 220 volt, 1000 watt are placed in series with each other across 220 volt lines. If resistance do not change with temperature, then the combined power is
|
(a) 1000 watt |
(b) 2000 watt |
(c) 500 watt |
(d) 4000 watt |
A resistance of 4
and a wire of length 5 metres and resistance 5 are joined in series and connected to a cell of e.m.f. 10 V and internal resistance 1. A parallel combination of two identical cells is balanced across 300 cm of the wire. The e.m.f. E of each cell is
|
(a) 1.5 V |
(b) 3.0 V |
(c) 0.67 V |
(d) 1.33 V |
A current carrying loop is free to turn in a uniform magnetic field. The loop will then come into equilibrium when its plane is inclined at
|
(a) 0° to the direction of the field |
(b) 45 ° to the direction of the field |
|
(c) 90° to the direction of the field |
(d) 135° to the direction of the field |
