List of top Physics Questions

Match List I with List II

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There are 4 electric bulb of 50W (each) is used for 5 hour per day. Calculate the energy consumed in the month of January.

The truth table for one of the following logic gates is given. Identify the logic gate

An electric bulb has a filament made of _______

Why do light emitting diodes are preferred over conventional incandescent low power lamps?

Brief exposure to the sound of minimum can damage ear drums of humans.

Two protons P and Q are placed between two charged plates A and B as shown, then

At what distance should an object be placed from a convex lens of focal length 15 cm to obtain a real image three times the size of the object?

A transmitting antenna at the top of a tower has a height 18 m and the height of the receiving antenna is 32 m. What is the maximum distance between them for satisfactory communication in line-of-sight mode? Given radius of earth is 6.4 × 10⁶ m

The electric field vector oscillates according to the equation \(\overrightarrow E = 4sin[1.8y +(5.4×10^6)t]\hat k\). The equation of magnetic field vector is:

The boiling point of water _______

A bulb of 100 W glows for 6 hours a day. The units of energy consumed in 7 days would be :

The circuits where transformers are used:

A coil having 'n' turns and resistance 'R'Ω is connected with a galvanometer of resistance '4R' Ω. What is the induced current in the circuit when this combination (coil+galvanometer) is moved in time t from a magnetic flux Φ1 to Φ2?

An emf of 0.5 V is developed in the secondary coil, when current in primary coil changes from 5.0 A to 2.0 A in 300 milliseconds. The mutual inductance of two coils would be:

Match List I with List II

Choose the correct answer from the options given below:

Match List I with List II

	LIST I		LIST II
A.	Magnetic dipole moment	I.	Weber/$m^2$
B.	Magnetic permeability	II.	Am (Ampere m)
C.	Pole strength	III.	Henry/m
D.	Magnetic flux density	IV.	$Am^2$ (Ampere $m^2$)

Choose the correct answer from the options given below:

At a place, the horizontal component of earth's magnetic field is $4 \times 10^{-4}T$ and angle of dip is 60°. The value of horizontal component of earth's magnetic field at the equator is :

Which of the following statement is correct for a potentiometer ?

For a long wire carrying a current of 10 A, the magnitude of magnetic field at a point 4 cm away from it will be:

The magnitude of electric current is increasing from A towards B. If there is any induced current in the loop as shown in the figure, its direction will be:

The susceptibility ($X_m$) and permeability (μ) of a perfectly diamagnetic substance are:

Six equal resistances are connected between points P, Q and R as shown in the figure. The net resistance will be maximum between:

A series AC circuit has a resistance 8Ω and a reactance of 6Ω . The impedance of the circuit is:

Ferro-magnetic materials used in transformer core must have: