The instrument to measure the relative density of liquid is

• A. thermometer
• B. hydrometer
• C. spring balance
• D. beaker

A car accelerates uniformly from rest at 5 ms^-2. Determine its speed after 10s

• A. 50.0ms^-1
• B. 25.0ms^-1
• C. 2.0ms^-1
• D. 0.5ms^-1

A test tube of radius 1.0cm is loaded to 8.8g. If is placed upright in water, find the depth to which it would sink

• A. 2.8cm
• B. 5.2cm
• C. 25.5cm
• D. 28.0cm

The core of an efficient transformer should consist of laminated pieces of metal in order to

• A. increase the heat produced by increasing the eddy current
• B. increase the heat produced by reducing the eddy current
• C. reduce the heat produced by increasing the eddy current
• D. reduce the heat produced by reducing the eddy current

Which of the following devices convert heat energy to electrical energy?

• A. transformer
• B. dynamo
• C. thermocouple
• D. thermostat

The area under a velocity-time graph represents

• A. final velocity attained
• B. distance covered
• C. acceleration
• D. workdone

The value of F in the figure below when in equilibrium is

• A. 10N
• B. 12N
• C. 20N
• D. 27N

A mirror of weight 75N is hung by a cord from a hook on the wall. If the cord makes an angle of 30^o with horizontal, the tension in the cord is

• A) 100N
• B) 1500N
• C) 250N
• D) 150N

The half-life of a radio-active element is 9 days, what fraction of atoms has decayed in 36 days?

• A. \( \frac{1}{16} \)
• B. \( \frac{1}{4} \)
• C. \( \frac{1}{2} \)
• D. \( \frac{15}{16} \)

A boy cycles continuously through a distance of 1.0 km in 5 minutes. Calculate his average speed

• A. 0.3ms^-1
• B. 3.3ms^-1
• C. 16.6ms^-1
• D. 20.0ms^-1