Archives

A wire can be broken by a load of 20 kg-wt. the force required to break wire of same material with twice the diameter will be

A wire can be broken by a load of 20 kg-wt. The force required to break wire of same material with twice the diameter will be 5 kg-wt 80 kg-wt... View Article

A body of mass 600g slides on a rough horizontal surface if frictional force is 2 N. Find the magnitude of contact force, where g is 10 m/s².

Answer: The normal force acting on an object can be calculated as: N = 0.6 kg × 10 m/s2 = 6 N The magnitude of contact forcecan be... View Article

From the state of rest a car accelerates while engine supplied constant power p. the velocity of car varies with time as

From the state of rest a car accelerates while engine supplied constant power p. The velocity of car varies with time as Answer: 3.... View Article

The current i in a coil varies with time as shown in figure. the variation of induced emf with the time would be

The current i in a coil varies with time as shown in figure. What would the variation of induced emf with the time would look like? Answer: 3.... View Article

What is the wavelength of light used?

In a young’s double slit experiment d = 1 mm and D = 200 cm. It is found that 9th bright fringe is at a distance of 6.5 mm from the 2nd... View Article

The radius of earth is 6400 km. At what depth below the earth surface does the acceleration due to gravity decreases by 2%?

The radius of earth is 6400 km. At what depth below the earth surface does the acceleration due to gravity decreases by 2%? 64 km 44 km 10 km... View Article

A charged particle moves in a circular orbit of radius r in a uniform magnetic field B₀. If the kinetic energy is doubled and the magnetic field is tripled, then the radius of the circular orbit will be

A charged particle moves in a circular orbit of radius r in a uniform magnetic field B0. If the kinetic energy is doubled and the magnetic field... View Article

Two infinite wires carrying current i0 and 2i0 are separated by distance d. magnitude of magnetic field at a point p at a distance d from both the wires is

Two infinite wires, separated by distance d1, carry current i0 and 2i0 in opposite directions. The magnitude of the magnetic field at a point p... View Article

The magnetic field at a distance r from a long wire carrying current i is 0.4 t. the magnetic field at a distance 2r is

The magnetic field at a distance r from a long wire carrying current i is 0.4 T. The magnetic field at a distance 2r is 0.8 T 0.2 T 0.16 T... View Article

The dip circle is at 30º with magnetic meridian. if apparent dip is 60º, then true dip is

The dip circle is at 30º with a magnetic meridian. If the apparent dip is 60º, then true dip is Answer: (a)... View Article

One mole of an ideal diatomic gas is carried from state a to state b as shown in figure. if the initial temperature at a is t0, the temperature at point b will be

One mole of an ideal diatomic gas is carried from the state a to state b as shown in figure. What is the change in the internal energy during the... View Article

An alternating voltage is applied to a series combination and an inductor of 400 mh. the power factor of the circuit is

An alternating voltage e = 200 sin 100 t is applied to a series combination and an inductor of 400 mh and R = 30 Ω. The power factor of the... View Article

For what distance ray optics is a good approximation when the aperture is 2 mm wide and wavelength is 200 nm?

For what distance ray optics is a good approximation when the aperture is 2 mm wide and wavelength is 200 nm? 20 m 30 m 50 m 40 m Answer: (1) 20 m... View Article

For the circuit shown in figure, value of resistance r is adjusted such that power dissipated in resistance r is maximum and equal to p0. The value of p0 is

For the circuit shown in the figure, the value of resistance R is adjusted such that power dissipated in resistance 8 Ω is maximum. Which... View Article

M	T	W	T	F	S	S
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31