Which of the following statements is incorrect?
(i) The flow of electric current in the circuit is from negative to the positive terminal of the battery.
(ii) Pure water is a good conductor of electricity.
(iii) In the electroplating of copper, copper gets transferred form the anode to the cathode.
(iv) In a dry cell, the electrolyte is a paste of ammonium chloride.
A(i) and (iv) only
B(ii) and (iv) only
C(ii) and (iii) only
D(i) and (ii) only
The first one is correct as it has been proved that current flows from negative to positive making the answer (ii) only, which is not one of the options!!
There are 3 children standing in a line for movie tickets.
• Javed is first in line.
• Chintoo is behind Lipika. What is the order of the children from first to last ?
AJaved, Lipika, Chintoo
BJaved, Chintoo, Lipika
CChintoo, Javed, Lipika
DLipika, Javed, Chintoo
The frequency of a source is 20 kHz. The frequencies of the sound waves produced by it in water and air will
ABe the same as that of the source
BDepend upon the velocity of the waves in these media
CDepend upon the wavelength of the waves in these media
DDepend upon the density of the media.
P, Q, R, S, T, V and W are sitting around a circle facing the centre. R is third to the right of V, who is second to the right of P. T is second to the left of Q, who is second to the left of W. V is sitting between S and W.
Who is sitting between T and V?
DCan't be determined
Which of the following are possible sets of polarity when magnetising a steel bar PQ by the stroking method? (For magnets, N indicates north pole and S indicates south pole)
(i) 1 = N, 2 = S, P = N, Q = S
(ii) 1 = N, 2 = S, P = S, Q = N
(iii) 1 = S, 2 = N, P = S, Q = N
(iv) 1 = S, 2 = N, P = N, Q = S
A(i) and (ii) only
B(iii) and (iv) only
C(i) and (iii) only
D(ii) and (iv) only
Either b or d which one should i give very confusing???