Do you want to BUY/SELL BTC call 07037238225 (@prezzy) # Jambites Physics Questions 2018

Discussion in 'Jamb' started by zedzed, Dec 20, 2017.

1. Below are Physic questions for 2018 jambites to study out

Question 1 of 20 The diagram is that of

• an auto transformer
• a step-down transformer
• a step-up tranformer
• an oil transformer
Question 2 of 20
I. High thermal capacity.
II. High sensitivity.
IV. Accuracy over a wide range of temperatures.

From the statements above, the qualities of a good thermometer are

• I, II, III and IV
• I and II
• II, III and IV
• I, III and IV
Question 3 of 20
The velocity of sound in air at 16°C is 340ms-1. What will it be when the pressure is doubled and its temperature raised to 127°C?

• 400ms-1
• 8,000ms-1
• 160,000ms-1
• 4,000ms-1
Question 4 of 20
In a hydraulic press, the pump piston exerts a pressure of 100Ïa on the liquid. What force is exerted in the second piston of cross-sectional area 3m2?

• 100N
• 300N
• 150N
• 200N
Question 5 of 20
The wavelength of a wave traveling with a velocity of 420ms-1 is 42m. what is its period?

• 1.2s
• 0.1s
• 1.0s
• 0.5s
Question 6 of 20
An object weighs 22kg in water and 30kg in air. What is the upthrust exerted by the liquid on the object? [g = 10ms-1]

• 50N
• 220N
• 80N
• 520N
Question 7 of 20
In a common emitter configuration, the output voltage is through the

• resistor
• base
• collector
• emitter
Question 8 of 20
An object of mass 20kg is released from a height of 10m above the ground level. The kinetic energy of the object just before it hits the ground is? [g=10ms-1]

• 200J
• 4000J
• 2000J
• 500J
Question 9 of 20
Which of the following is used for the correction of short-sightedness?

• Concave lens
• concave mirror
• convex mirror
• convex lens
Question 10 of 20 In the diagram 200W bulb is lighted by a 240V a.c mains supply if 1kWh is sold at N 40, the cost of keeping the bulb lighted for a day is ?

• N19.20
• N1.92
• N1920.00
• N192.00
Question 11 of 20 In the diagram, if the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be ?

• north and north
• south and south
• south and north
• north and south
Question 12 of 20
Which of the following is a property of steel?

• it cannot retain its magnetism longer than iron
• It can be used for making permanent magnets.
• It can easily be magnetized and demagnetized
• it can be used for making temporary magnets
Question 13 of 20
In an a.c circuit, the ratio of r.m.s value to peak value of current is

• 1/√2
• 2
• √2
• ½
Question 14 of 20
In a discharge tube, most of the gas is pumped out so that electricity is conducted at ?

• low pressure
• high pressure
• low voltage
Question 15 of 20
An object 4cm high is placed 15cm from a concave mirror of local length 5cm. the size of the image is ?

• 4cm
• 2cm
• 5cm
• 6cm
Question 16 of 20
The pressure of one mole of an ideal gas of volume 10-2m3 at a temperature of 27°C is? [Molar gas constant = 8.3 x J mol-1K-1]

• 2.49 x 105Nm-2
• 2.49 x 104Nm-2
• 2.24 x 104Nm-2
• 2.24 x 105Nm-2
Question 17 of 20
An object is embedded in a block of ice, 10cm below the plane surface. If the refractive index of the ice is 1.50, the apparent depth of the object below the surface is ?

• 7.63cm
• 7.50cm
• 2.50cm
• 6.77cm
Question 18 of 20
Under which of the following conditions do gases conduct electricity?

• low pressure and high P.d
• high pressure and high p.d
• Low pressure and low p.d
• High pressure and low p.d
Question 19 of 20
Two inductors of inductances 5mH and 15mH are connected in series and a current of 5A flows through them. The total energy stored in the inductors is ?

• 250.0J
• 50.0J
• 62.5J
• 500.0J
Question 20 of 20
An object is weighed at different locations on the earth. What will be the right observation ?

• the mass is constant while the weight varies
• both the mass and weight are constant
• both the mass and weight vary
• the weight is constant while the mass varies