Physics questions
20027 published questions with worked solutions.
- The equivalent resistance of series combination of two resistors is 's' When they are connected in parallel, the equivalent...
- The radius in kilometer to which the persent radius of earth (R = 6400 km) to be compressed so that the escape velocity is...
- A Parallel plate capacitor whose capacitance C is 14 pF is charged by a battery to a potential difference V = 12V between its...
- If 2.5 10^ -6 N average force is exerted by a light wave on a non-reflecting surface of 30 cm ^2 area during 40 minutes of time...
- Which of the following statements are correct? (A) Electric monopoles do not exist whereas magnetic monopoles exist. (B) Magnetic...
- For an adiabatic expansion of an ideal gas, the fractional change in its pressure is equal to (where is the ratio of specific...
- A plane electromagnetic wave propagating along y-direction can have the following pair of electric field ( E ) and magnetic field...
- Consider a uniform wire of mass M and length L. It is bent into a semicircle. Its moment of inertia about a line perpendicular to...
- If the angular velocity of earth's spin is increased such that the bodies at the equator start floating, the duration of the day...
- The decay of a proton to neutron is :
- In a series LCR circuit, the inductive reactance (X_L) is 10 and the capacitive reactance (X_C) is 4 . The resistance (R) in the...
- The angular momentum of a planet of mass M moving around the sun in an elliptical orbit is L . The magnitude of the areal...
- The function of time representing a simple harmonic motion with a period of is :
- The time taken for the magnetic energy to reach 25% of its maximum value, when a solenoid of resistance R, inductance L is...
- A particle of mass m moves in a circular orbit under the central potential field, U(r) = -C r , where C is a positive constant....
- Consider a sample of oxygen behaving like an ideal gas. At 300 K, the ratio of root mean square (rms) velocity to the average...
- The speed of electrons in a scanning electron microscope is 1 10^7 ms^ -1 . If the protons having the same speed are used instead...
- A ball of mass 4 kg, moving with a velocity of 10 ms^ -1 , collides with a spring of length 8 m and force constant 100 Nm^ -1 ....
- The radius of a sphere is measured to be (7.50 0.85) cm. Suppose the percentage error in its volume is x. The value of x, to the...
- An infinite number of point charges, each carrying 1 charge, are placed along the y-axis at y = 1 m, 2 m, 4 m, 8...