- AA force and a torque.
- BA force but not a torque.
- CA torque but no force.
- DNeither a force nor a torque.
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A diminished image of an object is to be obtained on a screen 1.0 m from it. This can be achieved by appropriately placing
|
(a) A convex mirror of suitable focal length |
|
(b) A concave mirror of suitable focal length |
|
(c) A concave lens of suitable focal length |
|
(d) A convex lens of suitable focal length less than 0.25 m |
The frequency of a FM transmitter without signal input is called
|
(a) Lower side band frequency |
(b) Upper side band frequency |
|
(c) Resting frequency |
(d) None of these |
When a thin metal plate is placed in the path of one of the interfering beams of light
|
(a) Fringe width increases |
(b) Fringes disappear |
|
(c) Fringes become brighter |
(d) Fringes becomes blurred |
The energy of the highest energy photon of Balmer series of hydrogen spectrum is close to
| (a) 13.6 eV | (b) 3.4 eV | (c) 1.5 eV | (d) 0.85 eV |
For a given thermocouple, the thermo e.m.f. can be
|
(a) Zero |
(b) Positive |
(c) Negative |
(d) All of the above |
A square metallic wire loop of side 0.1 m and resistance of 1W is moved with a constant velocity in a magnetic field of 2 wb/m2 as shown in figure. The magnetic field is perpendicular to the plane of the loop, loop is connected to a network of resistances. What should be the velocity of loop so as to have a steady current of 1mA in loop

|
(a) 1 cm/sec |
(b) 2 cm/sec |
(c) 3 cm/sec |
(d) 4 cm/sec |
The correct symbol for zener diode is
|
(a) |
(b) |
(c) |
(d) |