
- A160 V
- B$80\sqrt{80}$
- C80 V
- Dzero

Explanation:
VZY = VC - VL = 0
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Three bulbs of 40W, 60W and 100W are arranged in series with 220V. Which bulb has minimum resistance
|
(a) 40W |
(b) 60W |
(c) 100W |
(d) Equal in all bulbs |
The minimum energy required to remove an electron is called
|
(a) Stopping potential |
(b) Kinetic energy |
(c) Work function |
(d) None of these |
Unit of magnetic permeability is
|
(a) Amp/metre |
(b) Amp/ |
(c) Henry |
(d) Henry/metre |
What is the current (i) in the circuit as shown in figure
|
(a) 2 A |
(b) 1.2 A |
(c) 1 A |
(d) 0.5 A |
The electromagnetic waves travel with a velocity
|
(a) Equal to velocity of sound |
(b) Equal to velocity of light |
|
(c) Less than velocity of light |
(d) None of these |
A conductor in the form of a right angle ABC with AB = 3 cm and BC = 4 cm carries a current of 10 A. There is a uniform magnetic field of 5 T perpendicular to the plane of the conductor. The force on the conductor will be
|
(a) 1.5 N |
(b) 2.0 N |
(c) 2.5 N |
(d) 3.5 N |
The phenomena of total internal reflection is seen when angle of incidence is
|
(a) 90° |
(b) Greater than critical angle |
|
(c) Equal to critical angle |
(d) 0° |