Two similar accumulators each of emf E and internal resistance r are connected as shown in the following figure. Then, the potential difference between x and y is

A current of A enters one corner one corner P of an equilateral triangle having 3 wires of resistance 2each and leaves by the corner R. then the current and are

For the circuit shown in the figure the potential difference between A and B will be (in volt)

If A = and (aI₂ + bA)² = A, then-

Hence Choice 2 is correct

If A = then (A– 2I) (A – 3I) equals-

If A = and A² – KA– I₂ = 0, then value of K is-

If A = then Aⁿ equal to-

If A and B are two matrix of same order then A² – B² = (A + B) (A – B) correct statement is-

If A = then Aⁿ =

If A =, then A⁴ is equal to-

If A =, I is the unit matrix of the order two & a, b are arbitrary constant then
(aI + bA)² =

If AB = C; then A, B, C are-

The magnitude of I in ampere is

A cord of length 64 m is used to connect a 100 kg astronaut to a space-ship whose mass is much larger than that of the astronaut. Estimate the value of the tension in the cord. Assume that the space-ship is orbiting near earth surface. Also assume that the space-ship and the astronaut fall on a straight line from the earth’s centre. The radius of the earth is 6400 km.

If for a matrix A, A³ = I then A^–1 equals -

The temperature of the two outer surfaces of a composite slab, consists of two materials having coefficients of thermal conductivity K and 2K and thickness x and 4x respectively and
The rate of heat transfer through slab, in a steady state is with f equals to