In case of heat stroke, what should be done immediately?
A Cover the patient with any cloth, preferably with woollen cloth.
B Give the patient a solution of salt, sugar and lime or preferably juice of an unripe mango.
C Make the patient lie down in a sunny place.
D Give hot tea or coffee to the patient.
it was tricky
Motion of strings of a guitar shows
(i) oscillatory motion
(ii) vibratory motion
(iii) random motion
(iv) rotational motion
A (i) and (ii)
B (i) and (iii)
C (ii) and (iii)
D (ii) and (iv)
Observe the given situation and answer the following questions. Rahul and Ravi are playing in a ground. They start running from the same point X simultaneously in the ground and reach point Y at the same time by following paths marked 1 and 2 respectively, as shown in the figure.
Which one of the following paths does show the displacement?
Four pieces of wooden sticks P, Q, R and S are placed along the length of 15 cm long scale as shown in figure. What is the average length of these sticks?
A 2.0 cm
B 2.5 cm
C 2.6 cm
D 2.9 cm
Read the following statements carefully and select the correct option.
Statement 1: The poles of a magnet can never be separated.
Statement 2 : When a bar magnet is broken, each piece will have only one pole and its magnetism is enhanced.
ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true and statement 2 is false.
DBoth statements 1 and 2 are false.
Refer to the given figures and select the correct option regarding these, when they are operating.
AObject I converts mechanical energy into kinetic energy whereas object II converts electrical energy into potential energy.
BObject II converts electrical energy into kinetic, heat and sound energy.
CObject I converts potential energy into kinetic energy.
DBoth B and C
Sandhya made a musical instrument as shown in the figure using large wooden box, a broom handle and a length of string.
She tightened the string by pulling harder on the broom handle. What kind of sound will she hear now?
A A higher pitched note
B A louder note
C A lower pitched note
D None of these