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WorksheetsPast Paper Quiz 01
Total questions: 12
Worksheet time: 24mins
John pours some hot water into a cup. Suppose the cup has a higher heat capacity than the water. Which of the following graphs best shows how the temperatures of the water and the cup change with time?
It cannot be determined as the masses of the water and the cup are unknown.
A resistor has a resistance of 2 Ω at the ice point and 10 Ω at the steam point. What is the temperature when its resistance is 5 Ω?
30 °C
37.5 °C
50 °C
70 °C
A piece of metal, initially at 30 °C, is heated up by a heater. Its temperature increases to 70 °C in 4 minutes. How long does it take to further heat up the metal to 90 °C by the same heater? Assume the metal does not melt in the heating process, and the heat loss to the surroundings is negligible.
1 minute
2 minutes
3 minutes
It cannot be determined as the heat capacity of the piece of metal is not given.
In the figure below, John is standing in front of two thin glass panes P1 and P2 separated by a distance d. Images of John are formed by the two glass panes. Which of the following statements is correct?
The image formed by P1 is larger than that by P2.
The image formed by P1 is laterally inverted but that by P2 is not.
Given that John wants to see his whole body in both panes, the minimum size of P1 should be larger than that of P2.
The images formed by the two panes are separated by a distance of 2d.
Some liquid, a piece of glass and air form two parallel boundaries. A light ray falls on the liquid–glass boundary with an angle of incidence θ and its subsequent path is as shown. Suppose the refractive indices of the liquid and the glass are x and y respectively. Which of the following expressions gives sin θ?
1/x
1/y
1/(x+y)
1 - (x/y)
A prism in the shape of an equilateral triangle is made of material with refractive index 1.5. A light ray is directed from air on one side of the prism along the normal as shown. Which of the following best shows the subsequent path of the ray?
The critical angles of media X and Y are cX and cY respectively. If cX > cY, which of the following statements are correct?
(1) X is optically denser than Y.
(2) Light travels at a higher speed in X than in Y.
(3) When light travels from X to Y, total internal reflection must not occur.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
Several identical bulbs are connected in parallel to a dry cell as shown. Which of the following will NOT happen if one of the bulbs blows out?
The remaining bulbs become brighter.
The total current drawn from the cell decreases.
The bulbs will light up for a longer time.
The voltage across the bulbs remains the same.
Two straight wires P and Q, made of same material and connected to the same constant d.c. voltage supply in parallel. Their lengths are the same but P is thicker than Q. Which of the following statements is/are correct?
(1) The current flow through wire P is greater than that through wire Q.
(2) If wire Q is removed, the current flow through wires P increases.
(3) If the d.c. voltage is doubled, the resistance of wire P is also doubled.
(1) only
(3) only
(1) and (2) only
(2) and (3) only
Which of the following domestic electrical appliances consumes a power close to 1000 W in normal working conditions?
an electric fan
a microwave oven
a fluorescent lamp
a TV set
In the circuit shown, bulbs L1, L2 and L3 are all identical. When switch S is closed, how do the brightness of L1, L2 and L3 change?
L1 L2 L3
increases decreases decreases
increases increases decreases
decreases decreases remains unchanged
decreases increases remains unchanged
An electric kettle operates under mains electricity. Which of the following statements are incorrect?
(1) When the electric kettle operates normally, there is no current flows through the earth wire.
(2) When the electric kettle operates normally, current always flows from the live wire to the neutral wire.
(3) If the switch is installed in the neutral wire instead of the live wire, the electric kettle cannot operate normally.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
