An optically active compound (a) rotates the plane of polarised light. (b) changes the direction of polarised light. (c) does not allow plane polarised light to pass through. (d) none of these.

At magnetic poles, the angle of dip is

Choose the SI unit of electric potential energy : (a) Joule (b) Coulomb (c) Newton per coulomb (d) Erg

If distance between two current- carrying wires is doubled, then force between them is (a) halved (b) doubled (c) tripled (d) quadrupled.

In an A.C. circuit, Irms and I₀ are related as (a) Irms = p I₀ (b) Irms = 2 I₀ (c) Irms = I₀/p (d) Irms =I₀ / 2

In meter bridge, the balancing length from left end when standard resistance of 1 Ω is in right gap is found to be 20 cm. The value of unknown resistance is (a) 0.25 Ω (b) 0.4 Ω (c) 0.5 Ω (d) 4 Ω

In which of the following forms is the energy stored in a capacitor? (a) Charge (b) Potential (c) Capacitance (d) Electric field

Select the correct statements from the following (i) inside a charged or neutral conductor, electrostatic field is zero. (ii) the electrostatic field at the surface of the charged conductor must be tangential to the surface at any point. (iii) there is no net charge at any point inside the conductor. (A) (i) and (ii) (B) i) and (iii) (C) (ii) and (iii) (D) (i), (ii), and (iii)

The amount of work required to increase the distance between -6µC and 4µC from 6 cm to 18 cm will be : (a) 1.8 J (b) 2.4 J (c) 1.8 µJ (d) 2.4 µJ

The angle between magnetic axis and geographic axis of earth is

The capacitance of a capacitor will decrease if we introduce a slab of: (a) copper (b) aluminium (c) zinc (d) None of these

The coil of a moving coil galvanometer is wound over a metal frame in order to- (a) reduce hysteresis (b) increase sensitivity (c) increase moment of inertia (d) provide electromagnetic damping.

The core of a transformer is laminated because (a) ratio of voltage in primary and secondary may be increased (b) energy losses due to eddy currents may be minimized (c) the weight of the transformer may be reduced (d) rusting of the core may be prevented

The current sensitivity of a Galvanometer can be increased by decreasing- a) Magnetic field B b) No. of turns N c) Torsional constant k d) Area of the coil A

The direction of induced emf during electromagnetic induction is given by (a) Faraday’s law (b) Lenz’s law (c) Maxwell’s law (d) Ampere’s law