Mix Test - 4...

In the given circuit, what is the equivalent resistance between the points A and B (in ohms)?

A ball of mass 0.6 kg attached to a light inextensible string rotates in a vertical circle of radius 0.75 m. It has a speed of 5 ms^-1 when the string is horizontal. Tension in string, when it is horizontal on the other side, is
(Take g = 10 ms^-2)

If the radius of Earth suddenly decreases to 80% of its present value (the mass of Earth remaining the same), then the value of acceleration due to gravity will

An electric bulb has a rating of 100 W, 200 V. If the supply voltage drops to 100 V, then what is the total heat and light energy produced by the bulb in 20 minutes?

In a common base circuit of a transistor, the current amplification factor is 0.95. What is the base current when emitter current is 2 mA?

If and are non-zero vectors which obey the relation , then the angle between them is

The dimensions of entropy are

An object, a convex lens of focal length 20 cm and a plane mirror are arranged as shown in the figure given below. How far behind the mirror is the final image formed?

A circuit has a self-inductance of 1 H and carries a current of 2 A. To prevent sparking when the circuit is broken, a capacitor which can withstand 400 volts is used. The least capacitance of the capacitor connected across the switch must be equal to

The ratio of the intensities of the maxima and minima in an interference pattern is 49 : 9. What is the ratio of the intensities of the two coherent sources employed in the interference experiment?

The angular amplitude of a simple pendulum is θ₀. What will be the maximum tension in its string?

At a given volume and temperature, the pressure of a gas

The wavelength of de Broglie waves associated with an electron (mass m, charge e) accelerated through a potential difference of V is given by (h is Planck's constant)

The moment of inertia of a thin rod of mass M and length L about an axis passing through the point at a distance L/4 from one of its ends and perpendicular to the rod is

A charge q is placed at the centre of the line joining two equal charges Q. The system of three charges will be in equilibrium, if q is equal to