The temperature of a steel rod is 330 K. Its temperature in °C is ……………………..
A) 55° C
B) 59° C
C) 53° C
D) 57° C
1 Answers
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A positively charged glass rod is brought close to a metallic rod isolated from the ground.
Correct answer is (A) same as that on the glass rod and equal in quantity
2 Answers 3 views
A metre scale made up of aluminium (αa = 24 × 10^-6/°C) measures length of a steel rod (αs = 12 × 10^-6/°C) at room temperature as 50.00 cm.
At new temperature T °C, change in length of rod is, ∆LS = L0(αS∆T) = 50.00(12 × 10-6 × 100) = 0.06 cm. Hence, the actual length of rod at T °C, LS = 50.06 cm Due to change in...
2 Answers 1 views
One end of a metal rod one metre long is kept in ice and the other end is at 100 °C. What is temperature gradient throughout the rod?
Correct option is: (B) 100 °C/m
2 Answers 1 views
One end of copper rod is in contact with water at 100 °C and the other end in contact with ice at 0 °C. The length of the rod is 100 cm.
Correct option is: (A) 35 °C
2 Answers 8 views
A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature.
(B) 68 cm LCu αCu ∆T = LAl αAl ∆T ∴ 88 × (1.7 × 10-5) = LAl(2.2 × 10-5) ∴ LAl = \(\frac{88\times1.7}{2.2}\) ∴ LAl = 68 cm
2 Answers 1 views
The velocity of sound in air at NTP is 330 m/s. What will be its value when temperature is doubled and pressure is halved?
Correct option is: (D) \(\frac{330}{\sqrt{2}}\) m/s
2 Answers 1 views
The wavelength of sound in air is 1.5 m and that in liquid is 2 m. If the velocity of sound in air is 330 m/s, the velocity of sound in liquid is
Correct option is: (B) 440 m/’s
2 Answers 6 views
The speed of sound in air at NTP is 330 m/s. The period of sound wave of wavelength 66 cm is ……………
Correct option is: (D) 0.2 × 10-2 s
2 Answers 15 views
An iron rod changed into iron oxide by rusting. Guess how the weights before and after rusting of the iron rod are changed,
Correct option is C) a = b
2 Answers 1 views
A designer wanted to make a design with Iron rod. He has a rod of length 68 cm
B) Square only
2 Answers 1 views