QBManager

TEST SERIES (PHYSICS FST)

266644 Magnetic field can be produced by.

1 moving charge

2 steady electric current

3 By changing electric field

4 All of the above

**NCERT-PYQ**

TEST SERIES (PHYSICS FST)

266645 The image of a small electric bulb fixed on the wall of a room is to be obtained on the opposite wall 3 m away by means of a large convex lens. What is the maximum possible focal length of the lens required for the purpose?

1 50 cm

2 75 cm

3 100 cm

4 25 cm

Explanation:

b
FromDisplacement method $f_{max} = \frac{3}{4} m = 75 cm$ .

**NCERT-347**

TEST SERIES (PHYSICS FST)

266646 A right angled prism is shown in figure under action. The refractive index of the prism material may be:

1 1.2

2 1.45

3 1.5

4 Both 2 and 3

Explanation:

d
$\begin{aligned} 45 > C \\ \Rightarrow \frac{1}{\sqrt{2}} > \sin C \\ \Rightarrow μ > \sqrt{2} \end{aligned}$

**NCERT-322**

TEST SERIES (PHYSICS FST)

266647 The work function of cesium metal is 2.14 eV when light of frequency $6 \times 10^{14} Hz$ is incident on metal surface. photo emission of electron occurs what is maximum kinetic energy of photo electron in Joule ?

1

560 \times 10^{- 19}

2

56 \times 10^{- 19}

3

5.6 \times 10^{- 19}

4

0.56 \times 10^{- 19}

Explanation:

d
$\begin{aligned} K . E_{max} = h v - ϕ \\ E = hv \\ = \frac{6.63 \times 10^{- 34} \times 6 \times 10^{14}}{1.6 \times 10^{- 19}} eV \\ E = 2.49 eV \\ K E_{\max} = (2.49 - 2.14) eV \\ = 0.35 eV = 0.56 \times 10^{- 19} J \end{aligned}$

**NCERT-394**

TEST SERIES (PHYSICS FST)

266644 Magnetic field can be produced by.

1 moving charge

2 steady electric current

3 By changing electric field

4 All of the above

**NCERT-PYQ**

TEST SERIES (PHYSICS FST)

266645 The image of a small electric bulb fixed on the wall of a room is to be obtained on the opposite wall 3 m away by means of a large convex lens. What is the maximum possible focal length of the lens required for the purpose?

1 50 cm

2 75 cm

3 100 cm

4 25 cm

Explanation:

b
FromDisplacement method $f_{max} = \frac{3}{4} m = 75 cm$ .

**NCERT-347**

TEST SERIES (PHYSICS FST)

266646 A right angled prism is shown in figure under action. The refractive index of the prism material may be:

1 1.2

2 1.45

3 1.5

4 Both 2 and 3

Explanation:

d
$\begin{aligned} 45 > C \\ \Rightarrow \frac{1}{\sqrt{2}} > \sin C \\ \Rightarrow μ > \sqrt{2} \end{aligned}$

**NCERT-322**

TEST SERIES (PHYSICS FST)

266647 The work function of cesium metal is 2.14 eV when light of frequency $6 \times 10^{14} Hz$ is incident on metal surface. photo emission of electron occurs what is maximum kinetic energy of photo electron in Joule ?

1

560 \times 10^{- 19}

2

56 \times 10^{- 19}

3

5.6 \times 10^{- 19}

4

0.56 \times 10^{- 19}

Explanation:

d
$\begin{aligned} K . E_{max} = h v - ϕ \\ E = hv \\ = \frac{6.63 \times 10^{- 34} \times 6 \times 10^{14}}{1.6 \times 10^{- 19}} eV \\ E = 2.49 eV \\ K E_{\max} = (2.49 - 2.14) eV \\ = 0.35 eV = 0.56 \times 10^{- 19} J \end{aligned}$

**NCERT-394**

TEST SERIES (PHYSICS FST)

266644 Magnetic field can be produced by.

1 moving charge

2 steady electric current

3 By changing electric field

4 All of the above

**NCERT-PYQ**

TEST SERIES (PHYSICS FST)

266645 The image of a small electric bulb fixed on the wall of a room is to be obtained on the opposite wall 3 m away by means of a large convex lens. What is the maximum possible focal length of the lens required for the purpose?

1 50 cm

2 75 cm

3 100 cm

4 25 cm

Explanation:

b
FromDisplacement method $f_{max} = \frac{3}{4} m = 75 cm$ .

**NCERT-347**

TEST SERIES (PHYSICS FST)

266646 A right angled prism is shown in figure under action. The refractive index of the prism material may be:

1 1.2

2 1.45

3 1.5

4 Both 2 and 3

Explanation:

d
$\begin{aligned} 45 > C \\ \Rightarrow \frac{1}{\sqrt{2}} > \sin C \\ \Rightarrow μ > \sqrt{2} \end{aligned}$

**NCERT-322**

TEST SERIES (PHYSICS FST)

266647 The work function of cesium metal is 2.14 eV when light of frequency $6 \times 10^{14} Hz$ is incident on metal surface. photo emission of electron occurs what is maximum kinetic energy of photo electron in Joule ?

1

560 \times 10^{- 19}

2

56 \times 10^{- 19}

3

5.6 \times 10^{- 19}

4

0.56 \times 10^{- 19}

Explanation:

d
$\begin{aligned} K . E_{max} = h v - ϕ \\ E = hv \\ = \frac{6.63 \times 10^{- 34} \times 6 \times 10^{14}}{1.6 \times 10^{- 19}} eV \\ E = 2.49 eV \\ K E_{\max} = (2.49 - 2.14) eV \\ = 0.35 eV = 0.56 \times 10^{- 19} J \end{aligned}$

**NCERT-394**

TEST SERIES (PHYSICS FST)

266644 Magnetic field can be produced by.

1 moving charge

2 steady electric current

3 By changing electric field

4 All of the above

**NCERT-PYQ**

TEST SERIES (PHYSICS FST)

266645 The image of a small electric bulb fixed on the wall of a room is to be obtained on the opposite wall 3 m away by means of a large convex lens. What is the maximum possible focal length of the lens required for the purpose?

1 50 cm

2 75 cm

3 100 cm

4 25 cm

Explanation:

b
FromDisplacement method $f_{max} = \frac{3}{4} m = 75 cm$ .

**NCERT-347**

TEST SERIES (PHYSICS FST)

266646 A right angled prism is shown in figure under action. The refractive index of the prism material may be:

1 1.2

2 1.45

3 1.5

4 Both 2 and 3

Explanation:

d
$\begin{aligned} 45 > C \\ \Rightarrow \frac{1}{\sqrt{2}} > \sin C \\ \Rightarrow μ > \sqrt{2} \end{aligned}$

**NCERT-322**

TEST SERIES (PHYSICS FST)

266647 The work function of cesium metal is 2.14 eV when light of frequency $6 \times 10^{14} Hz$ is incident on metal surface. photo emission of electron occurs what is maximum kinetic energy of photo electron in Joule ?

1

560 \times 10^{- 19}

2

56 \times 10^{- 19}

3

5.6 \times 10^{- 19}

4

0.56 \times 10^{- 19}

Explanation:

d
$\begin{aligned} K . E_{max} = h v - ϕ \\ E = hv \\ = \frac{6.63 \times 10^{- 34} \times 6 \times 10^{14}}{1.6 \times 10^{- 19}} eV \\ E = 2.49 eV \\ K E_{\max} = (2.49 - 2.14) eV \\ = 0.35 eV = 0.56 \times 10^{- 19} J \end{aligned}$

**NCERT-394**

Question Bank Series

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Question Bank Series

Explanation:

Explanation:

Explanation:

Explanation: