Two strings each inclined at an angle 30o to the horizontal are used to hold a bucket of water weighing 20N. Calculate the tension in each string.

• A. 20√N
• B. 20N
• C. 10√N
• D. 10N

When²¹⁰₈₂Pb decays to²⁰⁶₈₀Pb, it emits

• A. two alpha and two beta particles
• B. an alpha particle
• C. one beta particle
• D. one alpha and one beta particle

The carbon-granules microphone works on the principle of change in

• A. inductance
• B. resistance
• C. capacitance
• D. voltage

which of the following pairs of physical quantities comprises vectors?

• A. capacitance and inductance
• B. force ratio and velocity ratio
• C. friction and momentum
• D. energy and power

I. Moon.

II. Sun.

III.street light.

IV. stars.

Which of these above is a natural source of light?

• A) II, III, and IV only
• B) I, II and III only
• C) III and IV only
• D) II and IV only

An object of mass 20kg slides down an inclined plane at an angle of 30o to the horizontal. The coefficient of static friction is? [g = 10ms^-2]

• A. 0.2
• B. 0.3
• C. 0.5
• D. 0.6

ln the diagram below, the resistor has a resistance 8Ω while the reactances of the inductor and the capacitor are 10Ω and 16Ω respectively Calculate the current in the circuit

• A. 3.6A
• B. 3.8A
• C. 9.2A
• D. 13.0A

An electric generator with a power output of 3.0KW at a voltage of 1.5KV distributes power along cables of resistance 20.0Ω. The power loss in the cables is

• A. 80.0W
• B. 40.0W
• C. 10.0W
• D. 0.1W

An object is placed on the principal axis and at the centre of curvature of a concave mirror, the image of the image formed by the mirror is

• A. real and magnified
• B. real and inverted
• C. erect and magnified
• D. erect and virtual

The accurate measurement of the relative density of a substance in its powdered form is done with a beam balance and

• A) a density bottle
• B) an eureka can
• C) a pipette
• D) a burette