CUET Level - I JEE Mock Test - 1(Physics)

The errors in the measurement which arise due to unpredictable fluctuations in temperature and voltage supply are

• Least count errors

• Random errors

• Instrumental errors

• Personal errors

A metal wire has mass (0.4 ± 0.002)g, radius (0.3 ± 0.001) mm and length (5 ± 0.02) cm. The maximum possible percentage error in the measurement of density will nearly be

• 1.6%

• 1.4%

• 1.2%

• 1.3%

Plane angle and solid angle have

• units but no dimensions

• Dimensions but no units

• No units and no dimensions

• Both units and dimensions

The area of rectangular field (in m²) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digits is

• 138 × 10¹

• 1382

• 1382.5

• 14 × 10²

The dimensions [MLT^-2A^-2] belong to the

• Magnetic flux

• Self inductance

• Magnetic permeability

• Electric permittivity

If E and G respectively denote energy and gravitational constant then E/G has the dimensions of

• Length
• Time
• Velocity
• Mass

Taking into account of the significant figures, what is the value of 9.99 m - 0.0099 m?

• 9.9801 m

• 9.98 m

• 9.980 m

• 9.9 m

Dimensions of stress are

• ML^-1T^-2

• MLT^-2

• ML²T^-2

• ML^-2T^-2

A, B, C and D are four different physical quantities having different dimensions. None of them is dimensionless. But we know that the equation AD = C ln(BD) holds true. Then which of the combination is not a meaningful a quantity?

• C/(BD) - (AD)²/C

• A² - B²C²

• A/B - C

• (A - C)/D

Which of the following statements is incorrect regarding significant figures?

• All the non - zero digits are significant

• All the zeros between two non-zero digits are significant.

• Greater the number of significant figures in a measurement, smaller is the percentage error.

• The power of 10 is counted while counting the number of significant figures.