## 1. The photoelectric work function for a metal surface is 4.125 eV. The cut-off wavelength for this surface is

AIPMT 1999 Dual Nature Of Radiation And Matter

## 2. A man weighs 80 kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 $ms^{-1}$ What would be the reading on thescale? (g = 10 $ms^{-2})$

AIPMT 2003 Laws Of Motion

## 3. What is the equivalent resistance between A and B in the given figure

AIIMS 1995 Current Electricity

KCET 2013 Atoms

## 5. Ablockofbase $l0 cm\times10 cm$ and height 15 cm is kept on an inclined plane. The coefficient of friction between them is $\sqrt3$. The inclination $\theta$ of this inclined plane from the horizontal plane is gradually increased from 0$^{\circ}$. Then

IIT JEE 2009 System Of Particles And Rotational Motion

## 6. The number of electrons in one coloumb of charges is

COMEDK 2015 Electric Charges And Fields

## 7. In a meter bridge a copper coil is connected in the right and a resistance of $10 \Omega$ in the left gap. The balance point is obtained at $0.2 \, m$. The resistance of the coil is

COMEDK 2012 Current Electricity

## 8. The value of current I in figure is

J & K CET 2005 Current Electricity

AIIMS 2011 Waves

## 10. Which of the following materials is the best conductor of electricity?

Rajasthan PMT 2009 Electromagnetic Induction

## 11. For the adjoining diagram, the correct relation between $I_1,I_2$ and $I_3$ is(I- moment of inertia)

AIPMT 2000 System Of Particles And Rotational Motion

## 12. In Young's double slit experiment, intensities at a bright fringe is $I$. When one of the slits is dosed, intensity at the same position is

COMEDK 2010 Wave Optics

## 13. The potential difference in volt across the resistance $R_3$ in the circuit shown in figure, is $(R_1 = 15 \Omega, R_2 = 15 \Omega), R_3 = 30 \Omega, R_4 = 35 \Omega$

Bihar CECE 2010 Electromagnetic Induction

## 14. A proton and an $\alpha$ particle enter perpendicular to a uniform magnetic field with same velocity. Frequency of revolution of a particle will be $X$ times that of proton. $X$ is

COMEDK 2008 Moving Charges And Magnetism

## 15. A rocket with a lift-off mass $3.5 \times 10^4$ kg is blasted upwards with an initial acceleration of $\ce{10 \, m \, s^{-2}}$. Then the initial thrust blast is

JIPMER 2016 Laws Of Motion

## 16. Two vibrating strings of the same material but of lengths L and 2L have radii 2r and r respectively. They are stretched under the same tension. Both the strings vibrate in their fundamental modes. The one of length L with frequency $v_1$ and the other with frequency $v_2 .$ The ratio $v_1/v_2$ is given by

IIT JEE 2000 Waves

## 17. A number of capacitors labelled as $8 \, \mu F, 250 \, V$ are given. Minimum number of capacitors needed to get an arrangement equivalent to $10 \, \mu F, 1000 \, V$ is

COMEDK 2005 Electrostatic Potential And Capacitance

AFMC 2010 Atoms

## 19. A bulb and a condenser are connected in series with an A.C. source. On increasing the frequency of the source its brightness will

AIIMS 2008 Current Electricity

## 20. A pure semiconductor has a/an

AIIMS 1994 Semiconductor Electronics: Materials Devices And Simple Circuits

## 22. The peak voltage in the output of a half wave diode rectifier fed with a sinusoidal signal without filter is 10 V. The d.c. component of the output voltage is

AIPMT 2004 Semiconductor Electronics: Materials Devices And Simple Circuits

## 24. Thermions are

AIPMT 1988 Dual Nature Of Radiation And Matter

## 25. In a coil of resistance 10 $\Omega$, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in weber is

AIPMT 2012 Electromagnetic Induction

## 26. One mole of an ideal gas at an initial temperature of T K does 6R joule of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 5/3, the final temperature of gas will be

AIPMT 2004 Thermodynamics

## 27. Assertion : The apparent weight of a body in an elevator moving with some downward acceleration is less than the actual weight of a body.Reason : The part of the weight is spent in producing downward acceleration, when body is in elevator.

AIIMS 2010 Laws Of Motion

## 28. One filament takes 10 min to heat a kettle and another takes 15 min. If connected in parallel they combindly take .........min to heat the same kettle

Rajasthan PMT 2006 Electromagnetic Induction

## 29. Assertion : No power loss associated with pure capacitor in ac circuit. Reason$\quad$: No current is flowing in this circuit.

AIIMS 2007 Alternating Current

## 30. A fly wheel rotating about fixed axis has a kinetic energy of 360 joule when its angular speed is 30 radian/sec. The moment of inertia of the wheel about the axis of rotation is

AIPMT 1990 System Of Particles And Rotational Motion