The magnetic field at the origin due to the current flowing in the wire shown is
Two blocks are connected over a massless pulley as shown in figure. The mass of block A is 10 kg and the coefficient of kinetic friction is 0.2. Block A slides down the incline at constant speed. The mass of block B in kg is:
A spherical ball is dropped in a long column of viscous liquid. The speed v of the ball as a function of time t may be best represented by
The power dissipated in the circuit shown in the figure is 30W. The value of R is
A d.c. battery of V volts is connected to a series combination of a resistor R and an ideal diode D as shown in the figure below. The potential difference across R will be
Name of the following reaction is
Which one of the following diagram represents the correct relationship among Colour, Black and White.
Find out the alternative figure which contains figure (X) as its part.
A piece of paper is folded and cut. From the figures given, indicate how it will appear when opened.