Question

Q1. Focal length of plane mirror is a. At infinity b. Zero c. Negative d. None of these
Q2.Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is (a) current (b) voltage (c) resistance (d) None of these
Q3. . A wire of length /, made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts are equal to, (a) ρ (b) ρ2 (c) 2 ρ (d) 4 ρ
Q4.The non-metal which is liquid at room temperature is: a) Mercury b) Bromine c) Carbon d) Helium
Q5.The most abundant metal in the earth’s crust is (a) Iron (b) Aluminium (c) Calcium (d) Sodium
Q6. When white light enters a prism, it gets split into its constituent colours. This is due to (a) different refractive index for different wavelength of each colour ​

Answer 1

Answer:

1.B

2.B

3.C

4.A

5.B

6.7 colours

Answer 2

Answer:

Q. 4 - bromine

Q. 5- aluminium